EP0154597A2 - A pneumatic tire - Google Patents

A pneumatic tire Download PDF

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Publication number
EP0154597A2
EP0154597A2 EP85630015A EP85630015A EP0154597A2 EP 0154597 A2 EP0154597 A2 EP 0154597A2 EP 85630015 A EP85630015 A EP 85630015A EP 85630015 A EP85630015 A EP 85630015A EP 0154597 A2 EP0154597 A2 EP 0154597A2
Authority
EP
European Patent Office
Prior art keywords
support
wire
bead
tire
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85630015A
Other languages
German (de)
French (fr)
Other versions
EP0154597B1 (en
EP0154597A3 (en
Inventor
Frank Philpott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Priority to AT85630015T priority Critical patent/ATE46870T1/en
Publication of EP0154597A2 publication Critical patent/EP0154597A2/en
Publication of EP0154597A3 publication Critical patent/EP0154597A3/en
Application granted granted Critical
Publication of EP0154597B1 publication Critical patent/EP0154597B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/28—Rolling-down or pressing-down the layers in the building process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/04—Bead cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • B29D2030/482—Applying fillers or apexes to bead cores
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10765—Characterized by belt or breaker structure
    • Y10T152/10792—Structure where each bias angle reinforcing cord ply has no opposingly angled ply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10855—Characterized by the carcass, carcass material, or physical arrangement of the carcass materials

Definitions

  • This invention relates to pneumatic tires and to a method of making a tire bead, particularly for heavy duty truck tires.
  • a typical tire has a bead core which is manufactured by coating wire in rubber compound and winding the wire on a die to form a hoop of bundled together wire, the bundle typically having a generally hexagonal, a generally round or a generally square cross-section and being known in the trade as a bead bundle.
  • the bead bundle is held in shape by spirally winding a wrapping cord around the outside of the bundle.
  • the bead bundles may become distorted during the manufacture of a tire, for example, the cross-section of -the bead core in the tire may be altered from being square to become rhomboid during the tire building.
  • the present invention seeks to provide a means of constructing a more stable tire bead assembly.
  • a method of making a tire bead assembly including the step of forming a substantially circular support of elastomeric material and which has a substantially 'U'-shaped radial cross-section having the channel therein directed radially outwardly of the circular support, and then combining said support with a bead core comprising a plurality of turns of wire bundled together, so as to lodge the bead core within the channel.
  • a pneumatic tire having a bead portion for seating on a wheel rim, said bead portion being reinforced by a bead core of wire extending circumferentially around the bead portion, said wire being housed within a circular elastomeric support which extends around the bead core and which forms a cradle in which the wire is located.
  • the cradle support has a substantially 'U'-shaped radial cross-section and the wire is lodged within the arms of the 'U'.
  • Fig. 1 there is shown a radial section through the bead portion 11 of a carcass of a heavy duty pneumatic tire.
  • the carcass is reinforced by a rubberized ply 12 of nylon or polyester cords.
  • the reinforcing ply 12 passes around the axially inner side of a bead assembly 13 and has a ply turn up portion 14 which extends up the axially outer side of the bead area.
  • the terms axially inner and axially outer refer to axial position relative to the mid-circumferential plane of the tire).
  • the bead portion has an internal surface 15 which could be lined with an air impermeable layer.
  • the bead assembly 13 (see Fig. 2) comprises a circular support 16 that extends continuously around the bead portion 11 of the tire and a bead core 20 of wire reinforcement 17 which also extends continuously around the bead portion.
  • the support 16 has a substantially 'U'-shaped radial cross-section with the arms 18 of the support 16 being directed radially outwardly of the tire to provide an annular channel or recess 19 therebetween which faces radially outwardly of the circular support.
  • the channel 19 is of a substantially square cross-section and the support 16 has an outer surface 23 which is substantially circular having a radius R struck from a point P at the center of the channel.
  • the sides 21 and base 22 of the channel 19 each have a respective height h or width W that is substantially equal to the radius R of the outer surface 20.
  • the channel 19 is substantially filled with the bead core 20 which comprises a single rubber coated wire 17 wound into adjacent hoops which are bundled together within the channel 19 of the support 16. Because the bead core 20 is lodged within the support, it allows for a close packing of the bead wire 17 as the bead 20 is formed by winding the wire 17 around the support 16.
  • the support 16 is made from an extrudable polyurethane elastomer of a hardness in the range shore A 70-100 at 20° C, a density range of 1.2-1.3 grm/cm3, and a tensile strength of 300-500 kg/cm z .
  • a material is marketed under the trade name DESMOPAN by Bayer Chemicals.
  • the bead assembly 13 may be made as follows, the polyurethane DESMOPAN is processed in an extruder 21 and an extrudate 22 of the desired cross-section, as illustrated for the support 16 in Fig. 2,is passed through a cutter 23 and cut to length.
  • the cut-to-length extrudate 22 is formed into a hoop-like support 16 by welding the ends of the extrudate 22 together so that the channel 19 faces radially outwards.
  • the bead core 20 is formed by winding single filament wire 17 around the polyurethane support until the channel 19 is almost filled.
  • the channel 19 need not necessarily be filled and a single profile could be used more than one size of tire e.g. 900 R 20 and 1000 R 20 use the same profile.
  • the completed bead assembly 13 is then used on the tire manufacture in the conventional manner.
  • a layer comprising a plurality of parallel wire filaments could be wound into the channel around the support.
  • the cut-to-length polyurethane extrudate 22 can be treated by leaching its surface to give some microporosity and then coating it with an adhesive for example an adhesive marketed under the tradename CHEMLOK 218 by Hughson Chemicals.
  • polyurethane support 16 instead of forming the polyurethane support 16 from a hooped extrudate 24 it is possible to inject or cast liquid polyurethane resin into a mold 31 having a cavity therein of the required shape. The resin cures to form a solid casting or molding. This process is called reaction injection molding.
  • Typical cast polyurethanes are marketed as two part systems, a glycol and an isocyanate, for example VULKOLLAN and DESMODUR marketed by Bayer Chemicals.
  • An advantage of the tire construction described in this specification is that the increased overall dimensions of the bead assembly 13 result in the carcass reinforcing ply 12 lying closer to the natural equilibrium curve of the tire.
  • the wire is would around a metal former to form a bead bundle, as is previously known.
  • the preformed circular support is then deformed and snapped into place around the bead bundle utilizing the elastomeric properties of the support.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Tyre Moulding (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

A pneumatic tire and a method of constructing a tire bead for the same, in which the tire has a bead portion (11) which is reinforced by a bead core (20) of wire running around the bead portion and the wire is housed in a circular elastomeric support (16) which forms a cradle in which the wire is located. The bead can be made by winding wire around the preformed elastomeric cradle.

Description

  • This invention relates to pneumatic tires and to a method of making a tire bead, particularly for heavy duty truck tires.
  • A typical tire has a bead core which is manufactured by coating wire in rubber compound and winding the wire on a die to form a hoop of bundled together wire, the bundle typically having a generally hexagonal, a generally round or a generally square cross-section and being known in the trade as a bead bundle. Sometimes the bead bundle is held in shape by spirally winding a wrapping cord around the outside of the bundle. However, the bead bundles may become distorted during the manufacture of a tire, for example, the cross-section of -the bead core in the tire may be altered from being square to become rhomboid during the tire building.
  • The present invention seeks to provide a means of constructing a more stable tire bead assembly.
  • Accordingly there is provided a method of making a tire bead assembly including the step of forming a substantially circular support of elastomeric material and which has a substantially 'U'-shaped radial cross-section having the channel therein directed radially outwardly of the circular support, and then combining said support with a bead core comprising a plurality of turns of wire bundled together, so as to lodge the bead core within the channel.
  • Also according to the invention there is provided a pneumatic tire having a bead portion for seating on a wheel rim, said bead portion being reinforced by a bead core of wire extending circumferentially around the bead portion, said wire being housed within a circular elastomeric support which extends around the bead core and which forms a cradle in which the wire is located.
  • Preferably the cradle support has a substantially 'U'-shaped radial cross-section and the wire is lodged within the arms of the 'U'.
    • DESCRIPTION OF DRAWINGS
  • The invention will be described by way of example and with reference to the accompanying drawings in which: -
    • Fig. 1 is a partial radial cross-section through a bead portion of a tire according to this invention.
    • Fig. 2 an enlarged radial cross-section through a bead assembly and its support as are utilised in Fig. 1.
    • Fig. 3 is a schematic representation of one method of manufacturing the bead assembly.
    • Fig. 4 is a schematical representation of and - alternate method of making the cradle.
    DETAILED DESCRIPTION
  • In Fig. 1 there is shown a radial section through the bead portion 11 of a carcass of a heavy duty pneumatic tire. The carcass is reinforced by a rubberized ply 12 of nylon or polyester cords. The reinforcing ply 12 passes around the axially inner side of a bead assembly 13 and has a ply turn up portion 14 which extends up the axially outer side of the bead area. (The terms axially inner and axially outer refer to axial position relative to the mid-circumferential plane of the tire). The bead portion has an internal surface 15 which could be lined with an air impermeable layer.
  • The bead assembly 13 (see Fig. 2) comprises a circular support 16 that extends continuously around the bead portion 11 of the tire and a bead core 20 of wire reinforcement 17 which also extends continuously around the bead portion. The support 16 has a substantially 'U'-shaped radial cross-section with the arms 18 of the support 16 being directed radially outwardly of the tire to provide an annular channel or recess 19 therebetween which faces radially outwardly of the circular support. The channel 19 is of a substantially square cross-section and the support 16 has an outer surface 23 which is substantially circular having a radius R struck from a point P at the center of the channel. The sides 21 and base 22 of the channel 19 each have a respective height h or width W that is substantially equal to the radius R of the outer surface 20. The channel 19 is substantially filled with the bead core 20 which comprises a single rubber coated wire 17 wound into adjacent hoops which are bundled together within the channel 19 of the support 16. Because the bead core 20 is lodged within the support, it allows for a close packing of the bead wire 17 as the bead 20 is formed by winding the wire 17 around the support 16.
  • In the present embodiment of the invention, the support 16 is made from an extrudable polyurethane elastomer of a hardness in the range shore A 70-100 at 20° C, a density range of 1.2-1.3 grm/cm3, and a tensile strength of 300-500 kg/cmz. Such a material is marketed under the trade name DESMOPAN by Bayer Chemicals.
  • Now with reference to Fig. 3, the bead assembly 13 may be made as follows, the polyurethane DESMOPAN is processed in an extruder 21 and an extrudate 22 of the desired cross-section, as illustrated for the support 16 in Fig. 2,is passed through a cutter 23 and cut to length. The cut-to-length extrudate 22 is formed into a hoop-like support 16 by welding the ends of the extrudate 22 together so that the channel 19 faces radially outwards. The bead core 20 is formed by winding single filament wire 17 around the polyurethane support until the channel 19 is almost filled. The channel 19 need not necessarily be filled and a single profile could be used more than one size of tire e.g. 900 R 20 and 1000 R 20 use the same profile. The completed bead assembly 13 is then used on the tire manufacture in the conventional manner.
  • As an alternative to winding a single filament wire around the support, a layer comprising a plurality of parallel wire filaments could be wound into the channel around the support.
  • If it is necessary to improve the adhesion between the polyurethane support and the rubber of the tire carcass, the cut-to-length polyurethane extrudate 22 can be treated by leaching its surface to give some microporosity and then coating it with an adhesive for example an adhesive marketed under the tradename CHEMLOK 218 by Hughson Chemicals.
  • Instead of forming the polyurethane support 16 from a hooped extrudate 24 it is possible to inject or cast liquid polyurethane resin into a mold 31 having a cavity therein of the required shape. The resin cures to form a solid casting or molding. This process is called reaction injection molding. Typical cast polyurethanes are marketed as two part systems, a glycol and an isocyanate, for example VULKOLLAN and DESMODUR marketed by Bayer Chemicals.
  • An advantage of the tire construction described in this specification is that the increased overall dimensions of the bead assembly 13 result in the carcass reinforcing ply 12 lying closer to the natural equilibrium curve of the tire.
  • In another method of assembly also according to this invention, the wire is would around a metal former to form a bead bundle, as is previously known. The preformed circular support is then deformed and snapped into place around the bead bundle utilizing the elastomeric properties of the support.
  • While certain embodiments and details have been shown for the purpose of illustrating the invention it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention.

Claims (9)

1. A method of making a tire bead assembly for use in a pneumatic tire characterized by the steps of forming a circular support of elastomeric material and which has a substantially 'U'-shaped radial cross-section having the channel therein directed radially outwardly of the circular support, and then combining said support with a bead core, comprising a plurality of turns of wire bundled together, so as to lodge the bead core within the channel.
2. A method as claimed in Claim 1 further characterized in that the bead core is combined with the support by winding wire around the support to bundle together a plurality of wire turns in the channel.
3. A method as claimed in Claim 1 or Claim 2 further characterized in that the circular support is formed from a 'U'-shaped cross-section extrudate which is cut-to-length, and formed into a hoop.
4. A method as claimed in Claim 1 or Claim 2 further characterized in that the circular support is cast from liquid polyurethane resin which subsequently cures and solidifies.
5. A pneumatic tire having a bead portion for seating on a wheel rim, said bead portion being reinforced by a bead core of wire extending circumferentially around the bead portion, said bead portion characterized by said wire being housed within a circular elastomeric support which extends around the bead core and which forms a cradle in which the wire is located.
6. A tire as claimed in Claim 5 further characterized in that the support has a substantially 'U'-shaped radial cross-section and the wire is lodged within the channel formed between the arms of the 'U'.
7. A tire as claimed in Claim 6 further characterized in that the support is formed from a polyurethane elastomer having a hardness of shore A 70 to 100 at 20°C.
8. A tire as claimed in Claim 7 further characterized in that the bead core consists of a bundle of wire cords extending around the support to substantially fill the channel within the 'U' section support.
9. A tire as claimed in Claim 6 further characterized in that the support has a radial cross-section such that the channel therein has a substantially square cross-section and the outer surface of the support has a substantially circular cross-section.
EP85630015A 1984-02-27 1985-02-26 A pneumatic tire Expired EP0154597B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85630015T ATE46870T1 (en) 1984-02-27 1985-02-26 TIRE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US584284 1984-02-27
US06/584,284 US4557307A (en) 1984-02-27 1984-02-27 Pneumatic tire

Publications (3)

Publication Number Publication Date
EP0154597A2 true EP0154597A2 (en) 1985-09-11
EP0154597A3 EP0154597A3 (en) 1987-05-20
EP0154597B1 EP0154597B1 (en) 1989-10-04

Family

ID=24336686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85630015A Expired EP0154597B1 (en) 1984-02-27 1985-02-26 A pneumatic tire

Country Status (10)

Country Link
US (1) US4557307A (en)
EP (1) EP0154597B1 (en)
JP (1) JPS60209305A (en)
KR (1) KR910008053B1 (en)
AT (1) ATE46870T1 (en)
AU (1) AU568008B2 (en)
BR (1) BR8500770A (en)
CA (1) CA1234339A (en)
DE (1) DE3573396D1 (en)
ZA (1) ZA851090B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615138A1 (en) * 1986-05-03 1987-11-26 Benteler Werke Ag RUBBER TIRES FOR VEHICLES
FR2628364A1 (en) * 1988-03-12 1989-09-15 Uniroyal Englebert Gmbh PNEUMATIC TIRE VEHICLE COMPRISING WOUND AND COATED METALLIC YARNS
US5127456A (en) * 1985-01-18 1992-07-07 Compagnie Generale Des Etablissements Michelin Sheathed bead ring to pneumatic tires; method of producing such a bead ring; pneumatic tires having such a bead ring
EP0620130A1 (en) * 1993-04-13 1994-10-19 PNEUMANT REIFEN & GUMMI WERKE GmbH Tyre for vehicles
EP0938985A1 (en) * 1998-02-26 1999-09-01 N.V. Bekaert S.A. Light-weight bead assembly with high-strength steel filaments
US20190030961A1 (en) * 2013-06-28 2019-01-31 Compagnie Generale Des Etablissements Michelin Bead Wire For A Tire, Tire And Manufacturing Method

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601293B1 (en) * 1986-07-09 1988-11-18 Michelin & Cie SHEATHED PIPE FOR TIRE COVERS; PROCESS FOR MAKING THIS TRINGLE; TIRE ENCLOSURES COMPRISING THIS TRINGLE.
FR2601294B1 (en) * 1986-07-09 1988-11-10 Michelin & Cie ROD FOR TIRE COVERS INCLUDING RIBS; PROCESS FOR MAKING THIS TRINGLE; TIRE COVERS INCLUDING SUCH A PIPE.
US5141033A (en) * 1987-12-08 1992-08-25 National-Standard Company Rubberless tire bead assemblies and methods of making same
US5226460A (en) * 1989-09-08 1993-07-13 Continental Aktiengesellschaft Method of producing a bead core for pneumatic tires
US5010938A (en) * 1990-03-30 1991-04-30 The Goodyear Tire & Rubber Company Tire incorporating a bead ring comprising round wire disposed in the shape of a parallelogram
JPH04278811A (en) * 1991-03-04 1992-10-05 Fuji Seiko Kk Bead wire
DE4442068A1 (en) * 1994-11-25 1996-05-30 Sp Reifenwerke Gmbh Bead core
ES2582482T3 (en) * 2000-03-10 2016-09-13 Smith & Nephew, Inc. Apparatus for use in knee arthroplasty
KR101054868B1 (en) 2008-12-09 2011-08-08 한국타이어 주식회사 Heavy duty tires with improved bead durability

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148899B (en) * 1960-12-31 1963-05-16 Dunlop Gummi Cie Ag Deutsche Bead insert for pneumatic tires
DE1605653A1 (en) * 1966-01-17 1971-01-28 Dunlop Co Ltd Composite bead core for a pneumatic tire and method for its manufacture
DE2412986A1 (en) * 1974-03-18 1975-10-02 Continental Gummi Werke Ag Stabilised securing ring for radial tyre - with elastic layer over metal rings in tyre walls
DE2603325A1 (en) * 1975-01-29 1976-08-05 Michelin & Cie TIRE
GB2123360A (en) * 1982-07-13 1984-02-01 Dunlop Ltd Tyre bead reinforcements

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1498532A (en) * 1924-06-24 Method and apparatus eos covering and rolling tire bead cores
US780209A (en) * 1904-04-21 1905-01-17 Firm Of Mitteldeutsche Gummiwaren Fabrik Louis Peter Fastening for wheel-tires.
US1536080A (en) * 1921-12-19 1925-05-05 Goodrich Co B F Tire bead and method of making tires
US1981893A (en) * 1931-06-11 1934-11-27 Morgan & Wright Tire bead and method for making the same
US2971553A (en) * 1957-03-04 1961-02-14 Firestone & Tire & Rubber Comp Tire construction
US2874747A (en) * 1957-04-17 1959-02-24 Firestone Tire & Rubber Co Tire construction
FR1558385A (en) * 1967-11-27 1969-02-28
DE2204746A1 (en) * 1972-02-01 1973-08-09 Uniroyal Ag TUBELESS VEHICLE TIRE
FR2220396B1 (en) * 1973-03-07 1977-07-08 Michelin & Cie
DE7713948U1 (en) * 1977-05-03 1977-09-29 Uniroyal Ag, 5100 Aachen HEAVY-DUTY VEHICLE TIRES, MOUNTED ON ANGLE SHOULDER RIMS, WITH A RING-SHAPED REINFORCEMENT UNIT FOR THE Bead
JPS5920481B2 (en) * 1979-01-10 1984-05-14 オツト−・ク−ルマン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ− Core for the bead of pneumatic tires for inclined rims
DE2940221C2 (en) * 1979-10-04 1983-10-13 Hahn GmbH & Co, 5992 Nachrodt Bead core for tubeless pneumatic vehicle tires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1148899B (en) * 1960-12-31 1963-05-16 Dunlop Gummi Cie Ag Deutsche Bead insert for pneumatic tires
DE1605653A1 (en) * 1966-01-17 1971-01-28 Dunlop Co Ltd Composite bead core for a pneumatic tire and method for its manufacture
DE2412986A1 (en) * 1974-03-18 1975-10-02 Continental Gummi Werke Ag Stabilised securing ring for radial tyre - with elastic layer over metal rings in tyre walls
DE2603325A1 (en) * 1975-01-29 1976-08-05 Michelin & Cie TIRE
GB2123360A (en) * 1982-07-13 1984-02-01 Dunlop Ltd Tyre bead reinforcements

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5127456A (en) * 1985-01-18 1992-07-07 Compagnie Generale Des Etablissements Michelin Sheathed bead ring to pneumatic tires; method of producing such a bead ring; pneumatic tires having such a bead ring
DE3615138A1 (en) * 1986-05-03 1987-11-26 Benteler Werke Ag RUBBER TIRES FOR VEHICLES
FR2628364A1 (en) * 1988-03-12 1989-09-15 Uniroyal Englebert Gmbh PNEUMATIC TIRE VEHICLE COMPRISING WOUND AND COATED METALLIC YARNS
GB2216853A (en) * 1988-03-12 1989-10-18 Uniroyal Englebert Gmbh Pneumatic vehicle tyre
GB2216853B (en) * 1988-03-12 1992-07-22 Uniroyal Englebert Gmbh Pneumatic vehicle tyre
EP0620130A1 (en) * 1993-04-13 1994-10-19 PNEUMANT REIFEN & GUMMI WERKE GmbH Tyre for vehicles
EP0938985A1 (en) * 1998-02-26 1999-09-01 N.V. Bekaert S.A. Light-weight bead assembly with high-strength steel filaments
US20190030961A1 (en) * 2013-06-28 2019-01-31 Compagnie Generale Des Etablissements Michelin Bead Wire For A Tire, Tire And Manufacturing Method
US10864780B2 (en) * 2013-06-28 2020-12-15 Compagnie Generale Des Etablissements Michelin Bead wire for a tire, tire and manufacturing method

Also Published As

Publication number Publication date
EP0154597B1 (en) 1989-10-04
EP0154597A3 (en) 1987-05-20
KR910008053B1 (en) 1991-10-07
BR8500770A (en) 1985-10-08
AU3915685A (en) 1985-09-05
CA1234339A (en) 1988-03-22
DE3573396D1 (en) 1989-11-09
ATE46870T1 (en) 1989-10-15
AU568008B2 (en) 1987-12-10
ZA851090B (en) 1985-09-25
KR850006336A (en) 1985-10-05
US4557307A (en) 1985-12-10
JPS60209305A (en) 1985-10-21

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